<!-- Player JWPLAYER: Initial Playlist , there is a first playlist who plays when we arrive at the page and I use a Json link --> <script type="text/javascript">jwplayer("mediaplayer").setup({ "playlist": "https://cdn.jwplayer.com/v2/playlists/lMeqEfxa"});</script>

<!-- Here I copy the code of the tuto and I would like to use Json links too. As that doesn't work, I tried with different syntax -->